Dianna Agron is missing in Glee Season 5, Episode 3, "The Quarterback." The young star's absence sparked a rumour that she was not in good terms with Glee's cast and crew. But a report indicates scheduling conflict prevented the actress from making an appearance in the Cory Monteith and Finn Hudson tribute.

As Quinn Fabray in Glee, Dianna played Cory Monteith's on-screen girlfriend before he fell in-love with Lea Michele's Rachel Berry.

"Dianna Agron Not Welcome At 'Glee' Tribute Show," says a Radar report headline. The report mentioned the Glee cast and crew thought the actress was not a team player, citing "a high-level source on the hit Fox show."

"They never saw her as a team player," Radar's source said, adding Lea Michele and Glee creator Ryan Murphy "intensely dislike Dianna and have both worked to marginalize her as much as possible."

Glee Season 5, Episode 3, 'The Quarterback' Tribute: Dianna Agron and Heather Morris Missing

Contradicting Radar's speculation is an E! News update, which cites "a source who works on the series." The Glee feud rumours are "not true at all," says the E! source.

"Heather Morris isn't in it either because of her pregnancy," the E! source said. "We included everyone we possibly could given schedules."

Dianna Agron Tweets Glee Stars

On Twitter, Dianna Agron has not lashed back at the rumour source. But her tweets to fellow Glee alum Amber Riley (Mercedes) and current Gleek star Darren Criss (Blane) indicate a lasting rapport with the show's cast. Dianna also joined the Glee stars in supporting Amber Riley at "Dancing with the Stars."

Quinn Fabray does get a mention in the 'The Quarterback.' Sue Sylvester (Jane Lynch) recalls the time when she caught Finn and Quinn in a compromising situation some years ago. (Listen to this Tumblr entry featuring a compilation of audio clips from Glee Season 5, Episode 3.)

Dianna Agron: From 'Glee' TV to Movies

Dianna Agron has been busy starring in movies. She was in DreamWorks' "I Am Number Four." During the time Glee was filming the Cory Monteith tribute, Agron's been promoting "The Family." Agron's co-stars in the latter include Robert De Niro, Michelle Pfeiffer, and Tommy Lee Jones. She will be seen next in "Pretenders."

More 'Glee Season 5' and TV Guide Features:

Glee Season 5 Spoilers: 'Make You Feel My Love' in 'The Quarterback' Songs, the Cory Monteith Tribute [VIDEOS]
Arrow Season 2 Spoilers: Stephen Amell Teases 'Awesome' Premiere; Olicity, Dig and Black Canary Level Up [PHOTOS]
Revenge Season 3 Spoilers: Aiden Mathis' and Patrick Harper's Motives, Emily Thorne's 'Conscience' and Daniel's New Job [PHOTOS]